package com.ljx.Config;

import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
import com.ljx.Utils.JacksonObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

@Slf4j
@Configuration
public class WebMvcConfig extends WebMvcConfigurationSupport {
    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        log.info("开始静态资源映射");
        registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/backend/");
        registry.addResourceHandler("/front/**").addResourceLocations("classpath:/front/");
    }
    @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor(){
        //创建拦截器对象
        MybatisPlusInterceptor myInterceptor = new MybatisPlusInterceptor();
        //添加分页拦截器对象
        myInterceptor.addInnerInterceptor(new PaginationInnerInterceptor());
        return myInterceptor;
    }

    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        //创建消息转换器
        MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
        //设置对象转换器，底层使用将java对象转换为json对象
        converter.setObjectMapper(new JacksonObjectMapper());
        //将上面的对象转换器追加到mvc框架的转换器集合中
        converters.add(0,converter);
    }
}
